of toledo



Sept. 15, 1931. 5, R 7 Re. 18,190

IEIGHING SCALE ori inal Filed Feb. 4, 192:

J'Omue/ /V f/ur/ mmvrox.

ATTORNEY.

Reissued Sept. 15, 1931 UNITED STATES PATENT; OFFICE v smear. it. near,or TOLEDO, omo, assrenoa 'ro 'roLEn'o scum MAHUIAMUBING comm, or rom no,01:10, a conromrron'or new mean WEIGHIN G SCALE Original 110. 1,732,103,dated October 15, 1929, Serial at. 6,879, filed February's, 1925.Application mreiuue'flled January 12, 1931. Serial Ho."508,273.

This invention relates to weighing scales, and more particularly tomeans-for fixedly retaining a pivot in place in a scale element.

One of the principal objects is to provide a suitable retainer for aivot which may be positioned within a bore in the lever or other scaleelement.

Another object is the provision of a means for so securing a pivot in alever that it may be readily removed or replaced without the use ofspecial tools.

Still another object is to provide means whereby the distancesbetweenpivots maybe very accurately located and securely locked in osition.

ther objects and advantages will be apparent from the followingdescription, in which reference is had to the accompanying drawingsillustrating preferred embodiments of my invention and whereinsimilarreference numerals designate similar parts throughout the severalviews.

In the drawings Figure I is a sectional elevational view throu h thebase of a weighing scale showinga pre erred means for securing a knifeedge pivot, in a lever;

Figure II- 's an vational view of a portion of a lever showing the pivotretaining means of my invention;

Figure III is a bottom plan view of that portion of the leverillustrated in Figure II;

Figure IVfis an isometric perspective view of- ,the preferred form ofthe pivot retaining device; a i

Figure V is a view similar to Figure II showlnga slightly modified formof my invention;

Fi re VI is another view similar to Figure I showing the pivots withtheir apices lying in the axes of the cylindrical openings in which thepivots are retained and a different means for fixedly securing the pivotrea taming means in position.

Referring to the drawings in detail, I have illustrated the pivotretainer of m invention as used in connection with a scale ever;however, it is to be understood that it is also adaptable for use insecuring pivots to other enlarged fragmentary olemembers for example,pendulums and other scale elements. 7

As the portion of the scale illustrated forms no part of my inventionper se, I will only'describe it in such detail as willsuifice to showthe connection of my invention thereto. The base 1' of the scale isadapted to'house and support levers 2 and3 upon which is supported aplatform spider 4 surmounted by the load-receiving platform 5. The lever2 is provided with an extension which is adapted to be connected to somesuitable form of load-counterbalancing mechanism (not shown) through themedium of the rod 6. The rod 6 is provided with a hook adapted to enga ean eye in a member 7 to which is pivota y connected a stirrup 8, thebight of the stirrup engaging a pivot 9 carried by the lever 2.

In order to reliably secure the pivot in the lever; I have provided thelever with a transverse bore 10 adapted to receive a retaining member 11having oertainsurfaces thereof cylindrical and which substantially fitthe walls of the bore 10. The member 11 is provided with a V-shapedgroove 12, the apex of which may be at the center of curvature of thecylindrical surfaces; however, in this form of the device'the apex ispreferably ofi of the center of curvature, as illustrated in thedrawings,' for a purpose to be hereinafter explained. In the assembly ofthe pivot retaining device the retaining member 11 is first inserted inthe bore of the lever and the knife edge pivot bar 9 placed in theV-shaped groove 12. The lever 2 is also provided with a pair of threadedopenings in the lower side thereof leading to the bore 10 which areadapted to receive screws 14, the inner ends.

of the screws engaging certain flat or wall portions of spaced grooves13 in the retaining member 11.. Y j

' As the pivot bar 9 fits the walls of the groove 12 very snugl and theapex of said groove in this form 0 the device is not coin-. cident withthe center of curvature, it will be; apparent that the pivot edges willnot be coincident-with the axis of the bore in the leven but radiallyspaced therefrom so that by skillful manipulation of the screws 14 theretaining member 11 and pivot bar 9 may be rotated in the bore to changethe position of the pivot edge relative to other pivot edges in i qlsve4 l d a 5m; e;ao" a e grooi e l fi' to reclaive the lge o the pivot,since it is diflicult in practice to form the bot hmattbegmom'm intoadmrpapextoreceive the sharp kerf be omitted, the edge of the pivot ahthe portion of the pivot bar groove 12,1nay becut away, so that thepivot will not b'epreve'nted I edge with the bottom of the groove'12from enteringfnlly into the groove. The screws 14, forcibly engaging thewalls of the grooves 13, wedge the member 11 the pivot bar .9, forcingof flr against the curved interior of ,the

in the lever and causing a slight defin. the retaining member 11, sotherat member and pivot are firmly held Upon releasmg the U screws 14,however, the retainer and g1 may be easily removed for purposes 0placement or repair. The projection 16 formed between .the ooves 13 ofthe member 11 serves as a D ab nmeut for the stirrup 8 when a load issuddenly removed from the platform and the nose of the lever, 'umps upor. when the twa e sa iwtedt s winch wmlld otherwise cause the thrustpeintsl'l to tend I tolodge und r the retaining member 11, such votalodgmant'is P fl md the pro on 16. form wn in IgureV,

J, ,asi; is the malpractice to .form the metaLin comparativelyong,baqsand to cut therefrom mto lengths.

form-shown mFlgure VI, I have employed a difierent for enangingmhgretaine l fl mr m 19" adapted to be engagd bga singlescraw 1 in thelevee. The back of the pivot bar 9'53; ur d. w coincident with, .offliepivot bar, so when the screw Ea-br ught inotgffiircrbleem periphery. 1te-ringseoretainerinto-ewedgingmngagammt w pivot the pivot-bar is thusfirmly. held in with itsedge accurately lo- 16. is shortened to conservemadman ma axisofthecylmdrical opemng. By accurately spac'mgnthe cpeningcina lever or othe'r scale part, the pivots mayjbe locatnd edges accu-1-hejeniborfiments of my invention Wand, arctobe regard fllus'trativeonly, and it-isto B' that the "is si'liceptibleto variation,

ef'the pivot; or it I! received y ment o t Gill;

modification and change within the spirit and see of the subjoinedclaims.

aving described my invention, I claim:

1. In a device of the class described, in combination, a member having abore therein, a pi mt a pivot retainer mounted in tlm bore, sald plvotretainer having 'a diametrically opposed recess and projection bothwithin said bone, and means with the retainer on: either side of aidprojection to clam the pivot in said recess.

2. a device of the class described, in combination, a member having abore therein, a pivot retainer mounted in the bore andhavmgadiametricall opposed recess and projection, a knife ed ge pivotmounted in said recess, and means engaging said pivot retainer on eithersideof the projectlon for posisaid pivot and retainer and locking samein adjusted ition.

3. In a device o the class described, in combination, a lever, a pivotretainer mounted therein, a thrust pro ection on said retainer, a pivotbar mounted in said retainer, said retainer hav' a kerf adjacent theedge of said pivot, an means en a ble with said retainer oneither side 0t e projection to forcibly retain the pivot in proper position.

.4. In a device of the class described, in combination, a member havinga bore therein, a pivot retainer mounted in said bore, a pivot armounted in said pivot retainer and pass ing throughsaid bore, aprojection on said pivot retainer, and means e cable with said retaineron either side of sai projection for adjusting and locking said pivotretainer and pivot bar in adjusted. position. 1

5. In a device of the class described, in combination, a member having abore therein, a pivot, a pivot retainer mounted in, said bore, saidretainer having a recess adapted to receivethe pivot, and meansincluding'a circular ring sector for forcibly engaging said pivotretainer to clamp said pivot in said 6. Ina device of the classdescribed, in combination, a member having a bore therein, a pivotretainer mounted in said bore, a pivot ar eccentrically mounted in saidpivot retainer, a circular ring sector'en'gaging said pivot retainer atseparated points, and means engaging said sector for clamping said pivotretainer and saidpivot bar in place.

. SAMUEL HURT

